This procedure covers the removal and replacement of electric motor mounts on the 2024 Rivian EDV 500 dual motor AWD system, requiring vehicle lifting and partial drivetrain support.

Warnings

Tools required

Parts

• Electric motor mount assembly × 1 — Use OEM specification
• Motor mount fastener kit × 1 — Use OEM specification
• High voltage connector seals (if disturbed) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Place wheel chocks at all four wheels
3. Access high voltage disconnect location in rear cargo area or under vehicle per service manual
4. Using Rivian diagnostic tool, place vehicle in service mode and verify HV system shutdown
5. Disconnect 12V auxiliary battery negative terminal
6. Disconnect high voltage battery system using service disconnect plug
7. Wait minimum 10 minutes for high voltage capacitor discharge
8. Using high voltage rated multimeter, verify 0V across HV terminals before proceeding
9. Raise vehicle on lift to comfortable working height and secure with jack stands
10. Remove underbody panels and skid plates to access motor mounts
11. Document motor position and alignment with photos or measurements for reinstallation reference

Procedure

1. 1

   Identify and access motor mount location
   Determine which motor mount requires replacement (front or rear motor). On EDV 500, front motor is located at front axle, rear motor at rear axle. Locate the motor mount assembly which connects the motor housing to the subframe or chassis. The mount is typically positioned on the motor casing flange with multiple bolt attachment points.
2. 2

   Support electric motor assembly
   Position hydraulic transmission jack or motor support fixture underneath the motor housing. Raise jack until it just contacts the motor casing with minimal pressure. Do not lift motor, only support its weight. Ensure jack is centered and stable. If using wood blocks, place them strategically to distribute load evenly across motor housing without contacting coolant lines or electrical connectors.
   ⚠️Motor must be fully supported before removing mount bolts. Failure to properly support motor can result in component damage or serious injury.
3. 3

   Disconnect interfering components
   Disconnect any electrical connectors, coolant lines, or sensor harnesses that restrict access to motor mount. Mark all connections for proper reassembly. For coolant lines, have drain pan ready as some EV Battery/Motor Coolant may drain from lines. Cap or plug any open coolant connections immediately to prevent contamination.
   ⚠EV coolant may be warm if vehicle was recently operated. Allow cooling system to cool before disconnecting lines.
4. 4

   Remove motor mount fasteners from motor side
   Locate all motor mount bolts connecting the mount to the motor housing. Typically 3-4 bolts secure the mount to the motor. Apply penetrating oil if fasteners show corrosion. Remove these bolts in a cross pattern to prevent binding. Keep all hardware organized and labeled for reinstallation. Note the length and position of each bolt as they may vary.
5. 5

   Remove motor mount fasteners from chassis side
   Locate all motor mount bolts connecting the mount bracket to the subframe or chassis. These are typically larger fasteners (usually 4-6 bolts). Remove these bolts while ensuring the motor remains fully supported on the jack. The motor may shift slightly as mounts are released; this is normal but monitor jack position.
6. 6

   Remove old motor mount assembly
   With all fasteners removed, carefully extract the motor mount assembly. Mount may require gentle prying or tapping to break free from alignment dowels or corrosion. Inspect removed mount for failure mode (torn rubber, separated metal components, fluid leakage). This helps identify root cause and prevent future failure.
7. 7

   Inspect mounting surfaces and alignment
   Clean all mounting surfaces on motor housing and chassis bracket with wire brush or solvent. Remove any rust, corrosion, or old gasket material. Inspect threaded holes for damage or stripped threads. Chase threads with appropriate tap if necessary. Verify alignment dowels or locating pins are present and undamaged.
8. 8

   Position new motor mount
   Install new motor mount assembly onto motor housing first. Align mount with locating dowels or alignment features. Start all motor-side bolts hand-tight but do not fully torque yet. Apply medium-strength thread locker to fastener threads per manufacturer specification. Ensure mount orientation matches original installation (reference photos taken during disassembly).
9. 9

   Align motor to chassis mounts
   Using hydraulic jack, carefully raise or lower motor assembly to align mount bracket with chassis mounting holes. May require slight repositioning of jack or motor rotation. Alignment should be close to original position recorded during preparation. Once aligned, start all chassis-side bolts hand-tight.
   ⚠Do not force alignment. Excessive force indicates misalignment which can cause premature mount failure and driveline vibration.
10. 10

    Torque motor mount fasteners
    Since torque specifications are not available in database, refer to Rivian service manual for exact values. Typical electric motor mount torque values range from 75-150 ft-lbs for chassis bolts and 40-80 ft-lbs for motor housing bolts. Torque all fasteners in cross pattern to ensure even load distribution. Verify all fasteners are properly seated and torqued.
    ⚠Use only torque specifications from official Rivian service documentation. Incorrect torque can lead to mount failure or motor misalignment.
11. 11

    Remove motor support and verify alignment
    Slowly lower hydraulic jack to transfer motor weight to new mount. Monitor for any unusual sagging or misalignment as weight transfers. Remove jack completely. Visually inspect motor position against reference measurements or photos. Motor should sit level with no visible stress on coolant lines or electrical connections.
12. 12

    Reconnect components and refill fluids
    Reconnect all electrical connectors, coolant lines, and sensor harnesses disconnected in step 3. Ensure all connections are fully seated and secured with retention clips. If coolant was lost, refill cooling system with EV Battery/Motor Coolant to proper level per service manual. Bleed air from cooling system following manufacturer procedure.
13. 13

    Reinstall underbody protection
    Reinstall all underbody panels, skid plates, and protective covers removed during access. Ensure all fasteners are properly torqued and no components are pinched or misaligned. Verify adequate clearance between rotating components and static panels.
14. 14

    Restore electrical systems
    Reconnect high voltage battery system using service disconnect plug. Ensure HV connector is fully seated and locked. Reconnect 12V auxiliary battery negative terminal. Using Rivian diagnostic tool, clear any stored fault codes and exit service mode. Perform HV system integrity check per manufacturer procedure.
15. 15

    System verification and test drive
    With vehicle still raised, perform visual inspection of all work completed. Check for any leaks, loose connections, or interfering components. Lower vehicle to ground. Start vehicle and verify no warning lights or error messages on display. Allow motor coolant to reach operating temperature and recheck coolant level. Perform test drive including acceleration, deceleration, and turning to verify no abnormal vibrations, noises, or motor misalignment symptoms.

Reassembly

1. Torque all fasteners to manufacturer specifications using cross pattern
2. Ensure motor weight is fully supported by new mount before removing support jack
3. Verify all high voltage connections are properly sealed and secured
4. Refill coolant system if any was lost during disconnection
5. Clear all diagnostic codes and exit service mode before test drive

Verification

• Start vehicle and verify no warning lights or HV system faults on instrument cluster
• Scan for diagnostic trouble codes using Rivian diagnostic tool - should show no motor mount or alignment faults
• Perform visual inspection with vehicle running to ensure no abnormal motor movement or vibration
• Test drive vehicle at various speeds (15-65 mph) checking for vibrations, unusual noises, or driveline symptoms
• Verify smooth acceleration and regenerative braking operation without clunking or binding
• Recheck motor mount fastener torque after 50-100 miles of operation to ensure no loosening has occurred
• Inspect coolant system for leaks around any connections that were disturbed
• Verify motor alignment measurements match pre-repair specifications

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